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pickupchik [31]
3 years ago
5

The table shows pairs of values for a linear function. A different function is defined by the equation y = -2x. Which of the fol

lowing statements is TRUE? *
The y-intercept of both functions is 0.
Both functions have a negative slope.
Both functions have a positive slope.
The functions are both proportional.

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
5 0

Answer:

Step-by-step explanation:

Both have a negative slope.

Both are proportional.

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Answer:

The 98% confidence interval estimate of the proportion of adults who use social media is (0.56, 0.6034).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

Of the 2809 people who responded to survey, 1634 stated that they currently use social media.

This means that n = 2809, \pi = \frac{1634}{2809} = 0.5817

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.5817 - 2.327\sqrt{\frac{0.5817*4183}{2809}} = 0.56

The upper limit of this interval is:

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Answer:

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